JP2001132971A - Water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely discharge hot water of ser temperature from a mixing valve 32 corresponding to the temperature of hot water supplied from a water heating unit 12, on the basis of a data table for supplied hot water temperature, which can be used in common for various types of water heating units 12. SOLUTION: Data tables for determining a mixing and regulating condition of a mixing valve 32 according to a set temperature of discharged hot water, corresponding to supplied hot water temperatures is prepared for every temperatures of supplied hot water corresponding to water heating units 12. A data table suitable for a water heating unit 12 to be combined is selected, and on the basis of the selected data table, a mixing and regulating condition of the valve 32 according to the set temperature of discharged water is controlled. The present water heater can be used for various types of water heating units 12 in common and can discharge hot water having the set temperature from the mixing valve 32 according to the temperature of the supplied hot water from the water heating units 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water supply apparatus for supplying hot and cold water at a set temperature using a mixing valve for mixing and adjusting hot water and water.

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Patent Laid-Open No.
As described in the publication, an electric water heater having a hot water storage tank for boiling and storing hot water is used as a hot water supply source, and hot water supplied from the electric water heater through a hot water supply path and water supplied through a water supply path are provided. There is known a water heater using a mixing valve that mixes and adjusts water to discharge hot water at a set temperature.

In such a hot water supply apparatus, when the hot water supply temperature from the electric water heater is, for example, 80 ° C., mixing of the mixing valve which can mix the 80 ° C. hot water and the water to discharge the hot water at the set hot water temperature. The control unit has a data table that determines the adjustment state, and the control unit controls the mixing adjustment state of the mixing valve according to the set tapping temperature.

[0004] When the temperature of hot water is changed, there is a case where the mixing element is automatically corrected by a thermo-element provided in the mixing valve to discharge hot water at a set hot water temperature. Was slight.

In some cases, the tapping temperature of tap water from the mixing valve is detected, and the mixing valve is feedback-controlled to correct the tapping temperature to the set tapping temperature. The range was about ± 10 ° C.

[0006]

As described above, the conventional hot water supply apparatus corresponds to the hot water supply temperature of the hot water supplied from the hot water supply source, and mixes the hot water supply temperature with the water to set the hot water supply temperature. Since the mixing adjustment state of the mixing valve is controlled so that hot water can be discharged, it is necessary to use a dedicated hot water supply device for hot water supply temperature, that is, an electric water heater having a hot water supply temperature of, for example, 80 ° C. It is necessary to use a dedicated water heater for each gas water heater at 50 ° C.

Further, when the tapping temperature of tapping water from the mixing valve is detected and the mixing valve is feedback-controlled so as to correct the tapping temperature to the set tapping temperature, the tapping temperature is corrected until the tapping temperature is corrected to the preset tapping temperature. It takes a long time, and there is a problem that hot water at the set hot water temperature cannot be immediately discharged. Further, when the temperature detection sensor for detecting the hot water supply temperature fails, there is a problem that correction cannot be performed and hot water at the set hot water temperature cannot be discharged.

The present invention has been made in view of such a point, and can be used commonly for various hot water supply sources having different hot water supply temperatures, and can reliably supply hot and cold water at a set outlet temperature from a mixing valve corresponding to the hot water supply temperature from the hot water supply source. It is an object of the present invention to provide a hot water supply device that can supply hot water to a hot spring.

[0009]

According to a first aspect of the present invention, there is provided a hot water supply apparatus comprising: a mixing valve for mixing and adjusting hot water supplied from a hot water supply source and water supplied from a water supply source to discharge hot water at a set hot water temperature; Storage means for storing, for each hot water supply temperature corresponding to the hot water supply source, a data table for each hot water temperature which determines a mixing adjustment state of the mixing valve according to the set hot water temperature; and one of the data tables for each hot water temperature. And a control means for controlling the mixing adjustment state of the mixing valve according to the set hot water temperature based on the hot water temperature data table selected by the selecting means.

Then, for each hot water supply temperature corresponding to the hot water supply source,
A hot water temperature-specific data table that determines the mixing adjustment state of the mixing valve according to the set hot water temperature is provided, and by selecting a hot water temperature-specific data table corresponding to the hot water source to be combined, based on the selected hot water temperature-specific data table. Since the mixing adjustment state of the mixing valve is controlled in accordance with the set hot water temperature, it can be shared by various hot water sources having different hot water temperatures, and the hot water of the set hot water temperature is supplied from the mixing valve according to the hot water temperature from the hot water source. Hot water is available.

[0011] According to a second aspect of the present invention, there is provided a hot water supply apparatus comprising: a mixing valve for mixing and adjusting the hot water supplied from the hot water supply source and the water supplied from the water supply source to discharge hot water at a set hot water temperature; and at least one reference hot water supply Storage means for storing a reference data table for determining a mixing adjustment state of the mixing valve according to the set tapping temperature for the temperature, and for storing a correction data table for correcting the reference data table for a hot water supply temperature different from the reference hot water supply temperature; Selecting means for selecting the hot water supply temperature, and when the reference hot water temperature is selected by the selecting means, controlling the mixing adjustment state of the mixing valve according to the set hot water temperature based on the reference data table, and supplying hot water different from the reference hot water temperature. Set based on the reference data table corrected by the correction data table when the temperature is selected In which and a control means for controlling the mixing adjustment state of the mixing valve in accordance with the water temperature.

A reference data table is provided for determining the mixing adjustment state of the mixing valve according to the set tapping temperature for at least one reference hot water supply temperature.
A correction data table for correcting the reference data table for a hot water temperature different from the reference hot water temperature is provided.By selecting the standard hot water temperature, the mixing adjustment state of the mixing valve can be controlled according to the set hot water temperature based on the reference data table. By selecting a hot water temperature different from the hot water temperature, the mixing adjustment state of the mixing valve is controlled according to the set hot water temperature based on the reference data table corrected by the correction data table, so that it can be shared by various hot water sources with different hot water temperatures Accordingly, hot water at a set hot water temperature can be discharged from the mixing valve in accordance with the hot water temperature from these hot water sources.

According to a third aspect of the present invention, in the hot water supply apparatus according to the first or second aspect, the selection means is a switch that switches according to the type of the hot water supply source.

By switching the switch in accordance with the type of the hot water supply source, there is no risk of failure of the sensor or the like, and selection can be made.

According to a fourth aspect of the present invention, in the hot water supply apparatus according to the first or second aspect, the selection means includes a hot water temperature detection means for detecting a hot water temperature, and the hot water temperature detected by the hot water temperature detection means. The selection is based on the temperature.

Then, based on the hot water temperature detected by the hot water temperature detecting means, the selecting means automatically selects the hot water.

According to a fifth aspect of the present invention, in the hot water supply apparatus according to the first or second aspect, the selecting means includes a tapping temperature detecting means for detecting a tapping temperature from the mixing valve, and a predetermined tapping temperature from the mixing valve. Hot water supply temperature judging means for judging the hot water supply temperature from the hot water temperature detected by the hot water temperature detecting means when the hot water is discharged in the mixed adjustment state of the above, and is selected based on the hot water supply temperature judged by the hot water temperature determining means. Things.

Then, the hot water supply temperature is determined from the hot water supply temperature when the hot water is discharged from the mixing valve in the mixing and adjusting state of the predetermined hot water supply temperature, and the selection means automatically selects the hot water supply temperature based on the hot water supply temperature.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a block diagram of a hot water supply system for a bathtub to which a hot water supply device is applied. A bathtub 11 is provided in an indoor bathroom or the like, and a hot water supply source 12 and a hot water unit 13 as a hot water supply device are provided outdoors or the like. Has been established.

The hot water supply source 12 is, for example, an electric water heater, a gas water heater, a solar heat collector / water heater (solar heat water heater), or a combination thereof, and in any case, a pre-stop type water heater. The pipe section of the water supply pipe 21 as a water supply channel that is directly connected to the water source that is the water source
21a is connected, and a hot water supply pipe 22 for guiding hot water to each hot water supply location such as a hot water unit 13 and a shower / hot / water mixer tap in a bathroom, a hot / water mixer tap in a kitchen, and a hot / water mixer tap in a washroom. It is connected. When the hot water is supplied from each hot water supply location, the hot water supply source 12
Is supplied through the hot water supply pipe 22.

When the hot water supply source 12 is an electric water heater, the water introduced into the hot water storage tank from the water supply pipe is heated to a set temperature by a heater disposed at the bottom of the hot water storage tank.
Boil water at ℃. The upper layer of hot water and the lower layer of room temperature water in the hot water storage tank are separated via a hot water mixture layer, and the mixed layer rises with the use of hot water.

When the hot water supply source 12 is a gas water heater, when detecting the flow of water or hot water at the time of tapping from each hot water supply place, the gas is ignited and heated, for example, boiling 50 ° C. hot water. Supply hot water.

When the hot water supply source 12 is a solar heat collecting water heater,
For example, hot water that can be heated by collecting solar heat with a solar heat collecting panel installed on the roof is stored in a hot water storage tank,
The hot water is supplied from the hot water storage tank, for example, by boiling 55 ° C. hot water.

The hot water unit 13 has an electric mixing valve 32 driven by a motor 31. The mixing valve 32 has a pipe section 21b of the water supply pipe 21 and a hot water supply pipe 22.
And a tapping pipe 33 are connected respectively. Mixing valve 32 mixes hot water supplied from hot water supply source 12 through hot water supply pipe 22 and water supplied through water supply pipe 21, and the tapping temperature of hot water discharged from tapping pipe 33 according to the mixing ratio of the hot water and water. Is adjusted to the set tapping temperature.

In the middle of the tapping pipe 33 of the mixing valve 32, a hopper 34 is connected. The hopper 34 has an electric valve 35 for opening and closing a flow path of the tapping pipe 33. A negative pressure actuating valve 36 that shuts off the mixing valve 32 side (water supply / hot water supply side) and the bathtub 11 side when the water supply pressure drops due to water cutoff or the like, and a flow sensor 37 that detects the amount of hot water supplied through the hot water supply pipe 33. , Mixing valve 32
Allows the flow of hot water from the side to the bathtub 11 and the bathtub
A check valve 38 for restricting the back flow of hot and cold water from the 11 side to the mixing valve 32 side is provided.

The tip of the tapping pipe 33 of the mixing valve 32
It is connected to the circulation path 40 via a passage switching electric valve 39 as a passage switching means. The circulation path 40 has an outgoing pipe 41 and a return pipe 42.
One end of 42 is connected integrally to a circulation fitting 43 installed in the bathtub 11, and the other end is connected to a passage switching electric valve 39. In the outgoing pipe 41, the bathtub 11
A circulation pump 44 for forcibly sending hot water in the piping 41 to forcibly circulate hot water in the circulation path 40, and a flow switch (water flow switch) for detecting the flow of hot water in the circulation path 40
45, bath thermistor that detects the temperature of hot and cold water in circulation circuit 40
46 、 Heat insulation heater for heating and keeping hot water flowing in the circulation path 40
47 are arranged. A pressure sensor (water level sensor) 48 for detecting the water level in the bathtub 11 is provided in the return pipe 42.

The passage switching motor-operated valve 39 includes a passage connecting the tapping pipe 33 and the outgoing pipe 41, a passage connecting the tapping pipe 33 and the return pipe 42, a tapping pipe 33 and the outgoing pipe 41 and the return pipe. The flow path is switched to four flow paths, that is, a flow path that connects the pipe 42 and a flow path that connects the going pipe 41 and the return pipe 42.

FIG. 2 shows a remote controller 51 arranged on a wall surface of a bathroom for operating the hot water unit 13. The remote controller 51 has a display 52 and an operation section 53 facing the surface of the remote controller 51, not shown. The operation unit 54 is opened and closed by a lid. The display 52 displays the time, the hot water setting water level (hot water amount) of the bathtub 11, the hot water temperature, the hot water supply temperature, and other operation displays. In the figure, all display locations are simultaneously displayed. Is shown. The operation unit 53 includes a bath automatic switch (automatic hot-water switch) 55 for instructing setting and canceling of the automatic hot-water bath, a priority switch 56 for giving priority to other remote controllers, and a high-temperature for giving high-temperature hot water. A hot water switch 57 and a call switch 58 for instructing generation of a ringing sound by another remote controller are provided. The operation unit 54 includes a bathtub 11
A hot water temperature switch 59 for adjusting and setting the hot water temperature in the bath, a hot water quantity switch 60 for adjusting and setting the hot water setting water level of the bathtub 11, a hot water switch 61 for adjusting and setting the hot water temperature, a hot water switch 62 for instructing hot water, Watering switch for watering
63, a washing switch 64 is provided. In addition, bath automatic switch 55, priority switch 56 and hot water hot water switch
A light emitting diode 65 for displaying the ON state of each of the switches 55 to 57 is provided adjacent to the switch 57.

FIG. 3 shows a hot water supply device (hot water unit 1).
The circuit diagram of 3) is shown. Reference numeral 71 denotes a control circuit.
Are formed on the substrate 72, and CP
U73, a ROM 74 as a storage means, a RAM 75, and the like.

A commercial power supply is connected to the substrate 72 via a leakage breaker 76, a power transformer 77 for converting the commercial power supply to a control power supply is connected, and connected to the leakage breaker 76 via a limiter 78. A switch 79 arranged in series with the limiter 78 and the heat retaining heater 47 is connected to the circulation pump 44 and the leakage breaker 76. The leakage breaker 76 is connected with a freeze prevention heater 80 installed in the hot water beam unit 13 and a freeze prevention thermo 81 that supplies electricity to the freeze prevention heater 80 when the temperature falls below a set temperature.

A mixing valve 32, a hot water supply electric valve 35, a flow path switching electric valve 39, and a remote controller 51 are connected to the substrate 72, and the flow rate sensor 37, the flow switch 4
5. The bath thermistor 46 and the pressure sensor 48 are connected.

On the substrate 72, a switch 82 is provided as selection means for selecting the type of the hot water supply source 12 or the hot water supply temperature. As the switch 82, for example, a dip switch is used.

As a control method of the mixing valve 32 corresponding to the type of the hot water supply source 12, there is a first control method. In the first control method, as shown in FIG. 4, a mixing adjustment state (mixing position) of the mixing valve 32 according to the set hot water temperature is determined in the ROM 74 for each hot water temperature corresponding to the type of the hot water source 12. Hot water temperature-specific data tables a to c are stored. For example, the hot water temperature data table a is for hot water temperature of about 90 ° C., the hot water temperature data table b is for hot water temperature of about 55 ° C., and the hot water temperature data table c is about 50 ° C.

The CPU 73 corresponds to the first control method,
Data table a to hot water temperature selected by switch 82
c, the mixing valve 32 according to the set tapping temperature.
Has a function of controlling the mixing adjustment state.

Next, the operation of the hot water supply system for a bathtub will be described.

First, when the bath automatic switch 55 of the remote controller 51 is turned on, the hot water supply electric valve 35 is opened and the mixing valve 32 is turned on.
The hot and cold water mixed and adjusted to the set hot water temperature is supplied to the bathtub 11 through the hot water pipe 33 and the circulation path 40. And the flow sensor
When the hot water is supplied to the hot water set water level based on the hot water supply amount based on the detection of 37 or the water level in the bathtub 11 based on the detection of the pressure sensor 48, the hot water supply electric valve 35 is closed to complete the hot water supply.

After the hot water is supplied, the passage switching motor-operated valve 39 switches to a passage connecting the outgoing pipe 41 and the return pipe 42 at predetermined time intervals, drives a circulation pump 44, and connects the bathtub 11 and the circulation path 40 to each other. The hot and cold water is circulated, and the bath thermistor 46 monitors the hot water temperature in the bathtub 11. If the temperature of the hot water in the bathtub 11 is lower than the set temperature, the heater 47 is turned on to keep the temperature at the set temperature.

After the hot water is supplied, the water level in the bathtub 11 is monitored by the pressure sensor 48 when the hot water in the bathtub 11 is not circulated. When the water level in the bathtub 11 drops below the set water level, the hot water is added to the set water level by the automatic hot water function. That is, the electric valve 35 for hot water supply is opened, and the hot water mixed and adjusted to the set hot water temperature by the mixing valve 32 is supplied to the hot water pipe 33 and the circulation path 40.
Hot water is supplied to the bathtub 11 through. Then, based on the amount of hot water supplied based on the detection of the flow rate sensor 37 or the level of water in the bathtub 11 based on the detection of the pressure sensor 48, when the predetermined hot water amount or the predetermined hot water level is reached, the electric valve 35 is turned on. Close and complete the hot water.

In addition, when the temperature of the hot water in the bathtub 11 is increased, that is, when hot water is supplied, according to the preference of the bather,
When the high-temperature hot water switch 57 of the remote control 51 is turned on, the mixing valve 32 is controlled to the hot water setting temperature so as to discharge hot water, the hot water supply electric valve 35 is opened, and the hot water setting valve is set by the mixing valve 32. The hot and cold water mixed and adjusted is supplied to the bathtub 11 through the tapping pipe 33 and the circulation path 40. Then, when a predetermined amount of hot water is supplied based on the hot water supply amount detected by the flow rate sensor 37, the hot water supply electric valve 35 is closed to complete the hot water supply.

Further, in order to raise the water level in the bathtub 11 according to the preference of the bather, the hot water switch of the remote controller 51 is used.
When 62 is turned on, the electric valve 35 for hot water supply is opened, and hot water mixed and adjusted to the set temperature by the mixing valve 32 is supplied to the bathtub 11 through the tapping pipe 33 and the circulation path 40. Then, based on the amount of hot water supplied based on the detection of the flow rate sensor 37 or the level of water in the bathtub 11 based on the detection of the pressure sensor 48, when the predetermined hot water amount or the predetermined hot water level is reached, the electric valve 35 is turned on. Close and complete the hot water.

The mixing valve 32 is connected to the CPU 73
The hot water supplied from the hot water supply source 12 through the hot water supply pipe 22 and the water supplied through the water supply pipe 23 are mixed and adjusted to discharge hot water at a set hot water temperature.

The control by the CPU 73 at this time is shown in the flowchart of FIG. Whether the hot water temperature data table a is selected by the switch 82 (step 11) or the hot water temperature data table b is selected (step 1)
2) It is determined whether or not the hot water temperature-specific data table c has been selected.

For example, when the hot water supply source 12 is an electric water heater for supplying hot water of about 90 ° C. and the hot water temperature-specific data table a is selected, the set hot water temperature is determined based on the hot water temperature-specific data table a. The mixing adjustment state of the mixing valve 32 is determined and controlled in accordance with (steps 13 and 14).

If the hot water supply source 12 is a solar heat collector / water heater for supplying hot water of about 55 ° C. and the hot water temperature-specific data table b is selected, the set hot water temperature is determined based on the hot water temperature-specific data table b. The mixing adjustment state of the mixing valve 32 is determined and controlled in accordance with (steps 15 and 14).

When the hot water supply source 12 is a gas water heater for supplying hot water of about 50 ° C. and the hot water temperature-specific data table c is selected, the hot water supply temperature is determined according to the set hot water temperature based on the hot water temperature-specific data table c. Then, the mixing adjustment state of the mixing valve 32 is determined and controlled (steps 16 and 14).

As described above, for each hot water supply temperature corresponding to the type of the hot water supply source 12, the mixing valve 32 corresponding to the set hot water supply temperature is provided.
Hot water temperature data tables a to determine the mixing adjustment state
c, and by selecting the hot water supply temperature-specific data tables ac corresponding to the hot water supply source 12 to be combined, the mixing valve 32 of the mixing valve 32 is set according to the set hot water temperature based on the selected hot water supply temperature-specific data tables ac. Since the mixing adjustment state can be controlled, it can be shared by various hot water sources 12 having different hot water temperatures, and the mixing valve 32 can reliably supply hot water at the set hot water temperature in accordance with the hot water temperature from the hot water source 12.

Next, as a control method of the mixing valve 32 corresponding to the type of the hot water supply source 12, a second control method will be described.

According to the second control method, the ROM 74 stores at least one reference hot water supply temperature as shown in FIG.
For example, for about 90 ° C., a reference data table A that determines the mixing adjustment state (mixing position) of the mixing valve 32 according to the set tapping temperature is stored, and FIG.
As shown in (b), a correction data table B for correcting the reference data table A is stored for a hot water supply temperature different from the reference hot water supply temperature and a temperature range of about 90 to 50 ° C. In the correction data table B, for example, when the hot water supply source 12 is a gas water heater and the hot water supply temperature is 50 ° C., the correction value is 7.5 ° C. as the correction value.

The CPU 73 responds to the second control method by
When the reference hot water supply temperature is selected by the switch 82, a function of controlling the mixing adjustment state of the mixing valve 32 according to the set hot water temperature based on the reference data table A, and a hot water supply temperature different from the reference hot water supply temperature is selected. And a function of controlling the mixing adjustment state of the mixing valve 32 according to the set tapping temperature based on the reference data table A corrected by the correction data table B. In this correction function, for example, when the hot water supply source 12 is a gas water heater, the hot water temperature is 50 ° C., the correction value is 7.5 ° C., and the set hot water temperature is 42 ° C., the correction hot water is corrected to 42 + 7.5 = 49.5 ° C. By controlling the mixing valve 32 using the reference data table A so as to supply hot water having the corrected tapping temperature of 49.5 ° C., the mixing valve 32 actually outputs 42.
℃ water is discharged.

Then, in the flowchart of FIG.
The control of the mixing valve 32 by 73 will be described. The switch 82 determines whether an electric water heater for supplying hot water of about 90 ° C. is selected by the hot water supply source 12 (step 21). If it is, the set outlet temperature is set based on the reference data table A. Then, the mixing adjustment state of the mixing valve 32 is determined and controlled according to (steps 22 and 23).

If a gas water heater for supplying hot water of about 50 ° C. is selected as the hot water supply source 12, the correction data table B
Is obtained as a correction value corresponding to the hot water supply temperature based on the reference temperature (step 24), and based on the reference data table A corrected so as to add the correction value 7.5 ° C., according to the set hot water temperature. The mixing adjustment state of the mixing valve 32 is determined and controlled (steps 25 and 23). In this case, as described above, for example, when the set tapping temperature is 42 ° C., 42+
7.5 = 49.5 ° C. is set as the corrected tapping temperature, and the mixing valve 32 is controlled by using the reference data table A so that tap water having the corrected tapping temperature of 49.5 ° C. is discharged. Actually, hot water of 42 ° C. is supplied.

Even when a solar collector / water heater for supplying hot water of about 55 ° C. is selected, the hot water supply
As in the case where the gas water heater for supplying 0 ° C. hot water is selected, a correction value corresponding to the hot water supply temperature is obtained based on the correction data table B (step 24), and correction is performed so that the correction value is added. Based on the reference data table A, the mixing adjustment state of the mixing valve 32 is determined and controlled according to the set tapping temperature (steps 25 and 23).

As described above, the reference data table A is provided for determining the mixing adjustment state of the mixing valve 32 in accordance with the set outlet temperature for at least one reference hot water temperature, and the reference data table A is provided for the hot water temperature different from the reference hot water temperature. A correction data table B is provided to correct the temperature of the hot water supply.
The mixing adjustment state of the mixing valve 32 can be controlled, and the mixing adjustment state of the mixing valve 32 is controlled according to the set tapping temperature based on the reference data table A corrected by the correction data table B by selecting a hot water supply temperature different from the reference hot water supply temperature. Since it can be used, various hot water supply sources 12 having different hot water supply temperatures can be used in common, and hot water at a set hot water temperature can be reliably discharged from the mixing valve 32 corresponding to the hot water supply temperature from these hot water supply sources 12.

The reference hot water supply temperature is not limited to about 90 ° C. when the hot water supply source 12 is an electric water heater, but is about 50 ° C. when the hot water supply source 12 is a gas water heater, or the solar hot water supply The temperature may be about 55 ° C. in the case of a vessel, and the number is not limited to one but may be plural.

Further, by using the switch 82 as a selecting means for selecting the type of the hot water supply source 12 or the hot water supply temperature, there is no possibility of failure as in the case of using a detection sensor or the like, so that the selection can be made reliably.

As a selecting means, for example, a hot water supply pipe
A hot water temperature detecting means (hot water temperature detecting sensor) for detecting the hot water temperature is provided at 22 or the like, and the type of the hot water source 12 or the hot water temperature is automatically selected based on the hot water temperature detected by the hot water temperature detecting means. You can also.

As a selecting means, for example, a tapping pipe
Discharge temperature detection means (discharge temperature detection sensor) for detecting the dispensing temperature from mixing valve 32 is provided in 33, and when dispensing from mixing valve 32 at a predetermined dispensing temperature, for example, 42 ° C., the mixture is adjusted. If the tap water temperature detected by the tap water temperature detecting means is 30 ° C., the CPU 73 has a function of the tap water temperature judging means for judging the tap water temperature from the tap water temperature such that the tap water temperature is 50 ° C. The hot water supply source is determined based on the hot water temperature determined by the determination means.
12 types or hot water temperature can be selected automatically.

The hot water supply device is not limited to the hot water unit 13, and may be used for guiding hot water to various hot water supply locations such as a shower in a bathroom, a hot water mixer tap in a kitchen, a hot water mixer tap in a washroom, and the like. Even when applied to a hot water supply unit, a similar effect can be obtained.

[0060]

According to the first aspect of the present invention, there is provided a data table for each hot water temperature corresponding to a hot water source corresponding to a set hot water temperature for determining a mixing adjustment state of a mixing valve according to a set hot water temperature. By selecting the hot water temperature-specific data table corresponding to the hot water source, the mixing adjustment state of the mixing valve can be controlled according to the set hot water temperature based on the selected hot water temperature-specific data table. The hot water can be shared with the hot water supply source, and the mixing valve can reliably supply hot water at the set hot water temperature in accordance with the hot water supply temperature from the hot water supply source.

According to the second aspect of the present invention, there is provided a reference data table for determining a mixing adjustment state of the mixing valve according to the set outlet temperature for at least one reference hot water temperature, and for a hot water temperature different from the reference hot water temperature. Equipped with a correction data table that corrects the reference data table, and by selecting the reference hot water temperature, the mixing adjustment state of the mixing valve can be controlled according to the set hot water temperature based on the reference data table, and a hot water temperature different from the reference hot water temperature is selected. By doing so, the mixing adjustment state of the mixing valve can be controlled according to the set tapping temperature based on the reference data table corrected by the correction data table, so that it can be shared by various hot water sources having different hot water temperatures, and the hot water temperature from these hot water sources can be used. The hot water of the set tap temperature from the mixing valve corresponding to The can be reliably hot water.

According to the third aspect of the present invention, in the hot water supply apparatus according to the first or second aspect, the selection means is a switch that switches according to the type of the hot water supply source, so that there is no possibility of failure of the detection sensor or the like. , Can be selected reliably.

According to the hot water supply apparatus of the fourth aspect, in the hot water supply apparatus of the first or second aspect, the selection means can automatically select the hot water supply temperature based on the hot water temperature detected by the hot water temperature detection means.

According to the fifth aspect of the present invention, in the hot water supply apparatus according to the first or second aspect, the selection means determines a tapping temperature based on the tapping temperature when tapping the mixing valve at a predetermined tapping temperature. The hot water supply temperature is determined, and automatic selection can be made based on the hot water supply temperature.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a hot water supply system for a bathtub to which a hot water supply device according to an embodiment of the present invention is applied.

FIG. 2 is a front view of a remote controller of the water heater.

FIG. 3 is a circuit diagram of the water heater.

FIG. 4 is an explanatory diagram showing a hot water supply temperature-specific data table corresponding to a first hot water supply method of the hot water supply apparatus.

FIG. 5 is a flowchart illustrating control of a mixing valve corresponding to a first hot water supply method of the hot water supply apparatus.

FIGS. 6A and 6B correspond to a first hot water supply method of the hot water supply apparatus, wherein FIG. 6A is an explanatory diagram showing a reference data table, and FIG. 6B is an explanatory diagram showing a correction data table.

FIG. 7 is a flowchart illustrating control of a mixing valve corresponding to a second hot water supply method of the hot water supply apparatus.

[Explanation of symbols]

 12 Hot water supply source 32 Mixing valve 73 CPU as control means and hot water temperature determination means 74 ROM as storage means 82 Switch as selection means

Claims (5)

[Claims] A mixing valve for mixing and adjusting the hot water supplied from the hot water supply source and the water supplied from the hot water supply source to discharge hot water at a set hot water temperature, and for each hot water supply temperature corresponding to the hot water supply source, Storage means for storing a hot water supply temperature-specific data table that determines the mixing adjustment state of the mixing valve according to the set hot water temperature; selecting means for selecting one of the hot water temperature-specific data tables; And a control means for controlling a mixing adjustment state of the mixing valve according to the set hot water temperature based on the hot water temperature-specific data table. 2. A mixing valve for mixing and adjusting the hot water supplied from the hot water supply source and the water supplied from the hot water supply source to discharge hot water at a set hot water temperature, and at least one reference hot water supply temperature to the hot water supply temperature. Storage means for storing a reference data table for determining a mixing adjustment state of the mixing valve corresponding thereto, and for storing a correction data table for correcting the reference data table for a hot water temperature different from the reference hot water temperature, and a selecting means for selecting the hot water temperature When the reference hot water temperature is selected by the selection means, the mixing adjustment state of the mixing valve is controlled according to the set hot water temperature based on the reference data table, and when a hot water temperature different from the reference hot water temperature is selected. Mixing according to the set tap temperature based on the reference data table corrected by the correction data table And a control means for controlling a mixing adjustment state of the valve. 3. The hot water supply apparatus according to claim 1, wherein the selection unit is a switch that switches according to the type of the hot water supply source. 4. The hot water supply temperature detecting means for detecting hot water temperature, and the selecting means selects the hot water based on the hot water temperature detected by the hot water temperature detecting means.
Or the hot water supply apparatus of 2. 5. A tapping temperature detection means for detecting tapping temperature from a mixing valve, and a tapping temperature detection means when tapping is performed in a mixing and adjusting state of a preset tapping temperature from the mixing valve. 3. The hot water supply apparatus according to claim 1, further comprising hot water supply temperature determining means for determining a hot water supply temperature from the hot water supply temperature, and selecting the hot water supply temperature based on the hot water supply temperature determined by the hot water supply temperature determining means.